Subscriptions with a Caveat

Shopify Partner
50 1 5

Hello everyone. I have a client who is selling 2 products.


She sells lint rollers and lint roller refills.


To entice customers to buy her lint rollers, she offers one free lint roller if you subscribe to receive refills monthly.

If you do not subscribe, you pay $3.99.

The caveat here is that she would also like customers to have the ability to specify how many lint roller refills they would like per month.


Do you know if this is something that can be set up in ReCharge (or ReCharge + Extension)?
Would you create products with variables to control this behavior? 


Thank you in advance for your input.

Below is an example of what this might look like to the customer.